EP 2843070 A4 20160120 - STEEL FOR MECHANICAL STRUCTURE FOR COLD WORKING, AND METHOD FOR MANUFACTURING SAME
Title (en)
STEEL FOR MECHANICAL STRUCTURE FOR COLD WORKING, AND METHOD FOR MANUFACTURING SAME
Title (de)
STAHL FÜR EINE MECHANISCHE STRUKTUR ZUR KALTBEARBEITUNG UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
ACIER POUR UNE STRUCTURE MÉCANIQUE POUR UN FORMAGE À FROID, ET PROCÉDÉ DE FABRICATION DE CE DERNIER
Publication
Application
Priority
- JP 2012098774 A 20120424
- JP 2013060357 W 20130404
Abstract (en)
[origin: EP2843070A1] The present invention is a steel for a mechanical structure for cold working, the steel characterized in containing C, Si, Mn, P, S, Al, N, and Cr, the remainder being iron and inevitable impurities; the metal composition having pearlite and pro-eutectoid ferrite; the combined area of the pearlite and pro-eutectoid ferrite being 90% or more of the total composition; the area percentage A of the pro-eutectoid ferrite having the relationship A>Ae, where Ae=(0.8-Ceq)×96.75 (Ceq=[C]+0.1×[Si]+0.06×[Mn]-0.11×[Cr], and "(element names)" indicates the element content (percent in mass); and the mean grain size of the pro-eutectoid ferrite and the ferrite in the pearlite being 15 to 25 µm.
IPC 8 full level
C21D 8/06 (2006.01); C22C 38/00 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP KR US)
C21D 1/00 (2013.01 - US); C21D 1/32 (2013.01 - EP US); C21D 6/002 (2013.01 - EP US); C21D 8/00 (2013.01 - KR); C21D 8/005 (2013.01 - US); C21D 8/06 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/40 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/60 (2013.01 - EP KR US); C21D 9/52 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/009 (2013.01 - EP US)
Citation (search report)
- [I] GB 2208654 A 19890412 - NIPPON STEEL CORP [JP]
- [A] GB 2187202 A 19870903 - NIPPON STEEL CORP
- See references of WO 2013161538A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2843070 A1 20150304; EP 2843070 A4 20160120; EP 2843070 B1 20180606; CA 2868394 A1 20131031; CA 2868394 C 20170307; CN 104245987 A 20141224; CN 104245987 B 20161123; JP 2013227602 A 20131107; JP 5486634 B2 20140507; KR 101598319 B1 20160226; KR 20140139020 A 20141204; MX 2014012971 A 20150508; TW 201402837 A 20140116; TW I490346 B 20150701; US 2015041029 A1 20150212; US 9914990 B2 20180313; WO 2013161538 A1 20131031
DOCDB simple family (application)
EP 13781028 A 20130404; CA 2868394 A 20130404; CN 201380021104 A 20130404; JP 2012098774 A 20120424; JP 2013060357 W 20130404; KR 20147029416 A 20130404; MX 2014012971 A 20130404; TW 102113604 A 20130417; US 201314387906 A 20130404